When NASA's Jet Propulsion Laboratory wanted a spokes-AI to explain how fusion and fission work, they tapped GLaDOS, the science-loving antagonist from the Portal games. But once GLaDOS gets inside NASA, can anyone stop her?

Ellen McLain, the actress who voices GLaDOS, reprises her role in this educational sketch for the education & public outreach department of NASA's Spitzer Space Telescope. It's nice to see that GLaDOS' affection for science is so great that she earnestly educates her ignorant computer technicians on the wonders of physics even as she otherwise attempts to deceive them—and that, even without Chell as a target, she'll still indulge in a bit of psychological mayhem.